CN209341522U - Circuit board and air conditioner - Google Patents
Circuit board and air conditioner Download PDFInfo
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- CN209341522U CN209341522U CN201920021037.0U CN201920021037U CN209341522U CN 209341522 U CN209341522 U CN 209341522U CN 201920021037 U CN201920021037 U CN 201920021037U CN 209341522 U CN209341522 U CN 209341522U
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Abstract
The utility model provides a kind of circuit board and air conditioner, circuit board includes the first power module, first power module is used to be load supplying, circuit board further include: power factor correction module and fault detection module, one end of power factor correction module is connected with the power supply module, power factor correction module includes first resistor and power switch, and one end of first resistor is connected with the emitter of power switch, the other end ground connection of first resistor；The input terminal of fault detection module is connected with first resistor；Wherein, the grounding point of fault detection module and the grounding point of first resistor are identical, interfere with each other to avoid between multiple fault detection modules.Circuit board provided by the utility model, by setting total place for fault detection module and first resistor, avoid influence of the power switch to sampling resistor, and interfering with each other between multiple fault detection modules, and then ensure the accuracy of detection of the fault detection circuit to the voltage or electric current at sampling resistor both ends.
Description
Technical field
The utility model relates to air conditioner technical fields, in particular to a kind of circuit board and air conditioner.
Background technique
Currently, in the control circuit of air conditioner, since crisscross parallel has multiple IGBT modules, so multiple adopt need to be arranged
Sample resistance samples the electric current for flowing through IGBT module, to avoid IGBT module overcurrent IGBT module is damaged.In phase
In the technology of pass, multiple IGBT module rotation works have high frequency pressure difference between each sampling resistor and the tie point of negative busbar, influence
The accuracy of fault detection circuit protection and anti-interference ability.
Utility model content
The utility model aims to solve at least one of technical problems existing in the prior art or related technologies.
For this purpose, the first aspect of the utility model proposes a kind of circuit board.
The second aspect of the utility model proposes a kind of air conditioner.
In view of this, the first aspect of the utility model provides a kind of circuit board, including the first power module, the first electricity
Source module is used to be load supplying, circuit board further include: power factor correction module and fault detection module, PFC
One end of module is connected with the power supply module, and power factor correction module includes first resistor and power switch, first resistor
One end is connected with the emitter of power switch, the other end ground connection of first resistor；The input terminal of fault detection module and first
Resistance is connected；Wherein, the grounding point of fault detection module and the grounding point of first resistor are identical, to avoid multiple fault detections
It is interfered with each other between module.
Circuit board provided by the utility model is realized by the way that fault detection module is arranged to power factor correction module
Detection and protection, avoid power factor correction module generate over-current phenomenon avoidance；By by the grounding point of fault detection module and
The grounding point of one resistance is set as total place, so that the pick-up point of fault detection module rests firmly against sampling resistor and negative busbar
Connected position is directly connected near sampled signal so that the ground wire of each fault detection module is independent, eliminates power
The common mode interference that factor correcting module introduces, reduces the circulation of system voltage, and on the other hand, driving circuit is also and sample circuit
Decoupling avoids interfering with each other between influence and multiple fault detection modules of the power switch to sampling resistor, and then really
The accuracy of detection of the fault detection circuit to the voltage or electric current at sampling resistor both ends is protected, so that fault detection circuit is more
It is safe and reliable.
Specifically, the voltage at fault detection circuit acquisition first resistor both ends, according to the resistance of the voltage and first resistor
Value calculates the electric current of first resistor, compares the size between the electric current of first resistor and predetermined current, that is, can determine whether power because
Number correction modules whether overcurrent；Equally can by fault detection circuit acquire first resistor both ends voltage, and by the voltage with
Predeterminated voltage compares, so judge power factor correction module whether overcurrent.First resistor is sampling resistor.
Preferably, first resistor is that multiple noninductive resistances are in parallel.
In addition, the circuit board in above-mentioned technical proposal provided by the utility model can also have following supplementary technology special
Sign:
In the above-mentioned technical solutions, it is preferable that power factor correction module further include: the first inductance, drive module and
Two power modules；One end of first inductance is connected with the power supply module, and the other end is connected with the collector of power switch；Driving
The input terminal of module is connected with the output end of fault detection module, the output end phase and the base stage phase of power switch of drive module
Connection；Second power supply module is connected with the feeder ear of drive module.
In the technical scheme, by the way that drive module is arranged, drive module is used to control the conducting and disconnection of power switch,
Drive module is connected with fault detection module, and when over-current phenomenon avoidance occurs for power switch, fault detection circuit detects the first electricity
Overcurrent is hindered, and over-current signal is sent to drive module, drive module controls power switch and disconnects, and power factor correction module is stopped
It only works, when power switch works normally, when over-current phenomenon avoidance not occurring, fault detection circuit is normal to drive module transmission electric current
Signal, driving circuit control power switch tend to remain on, and power factor correction module works normally.Preferably, power is opened
Close is IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) or metal-oxide-semiconductor (metal-
Oxide-semiconductor field effect transistor, metal-oxide semiconductor fieldeffect transistor).
In any of the above-described technical solution, it is preferable that power factor correction module further include: second resistance, second resistance
One end be connected with the output end of drive module, the other end of second resistance is connected with the base stage of power switch.
In the technical scheme, by the way that second resistance is arranged, one end of second resistance is connected with the output end of drive module
It connects, the other end of second resistance is connected with the base stage of power switch, it is ensured that the driving letter that drive module is issued to power switch
It is number more stable, and then ensure the stability of power switch work.
In any of the above-described technical solution, it is preferable that second power supply module is connected with second source, second power supply module
It include: twelfth resistor, one end of twelfth resistor is connected with second source, and the other end is connected with the feeder ear of drive module
It connects.
In the technical scheme, second power supply module is connected with second source, and second source is external power supply, preferably
15V DC power supply；By the way that twelfth resistor is arranged between second source and drive module, avoid second source in radio circuit
Upper short circuit, it is ensured that second source can directly be connected with the feeder ear of drive module, power for drive module.
In any of the above-described technical solution, it is preferable that second power supply module further include: Voltage stabilizing module and anti-die block excessively,
Voltage stabilizing module one end is connected with second source, other end ground connection；Anti- one end for crossing die block is connected with second source, another
End ground connection.
In the technical scheme, by the way that Voltage stabilizing module is arranged, it is ensured that the voltage stabilization of drive module, by the way that anti-over-voltage is arranged
Module avoids drive module from burning because of second source over-voltage.Preferably, Voltage stabilizing module includes two capacitors in parallel, anti-mistake
Die block is diode.
In any of the above-described technical solution, it is preferable that circuit board further includes control module, and power factor correction module is also wrapped
It includes: the first triode and the second triode；The base stage of first triode is connected with the output end of control module, the first triode
Collector be connected with the 4th power supply；The base stage of second triode is connected with the output end of control module, the second triode
Emitter be connected with the emitter of the first triode, and be connected with the input terminal of drive module, the collection of the second triode
Electrode ground connection.
In the technical scheme, by the first triode of setting and the second triode, the conversion of level is realized, so that driving
The grounding point of module and the grounding point of fault detection circuit are mutually indepedent, avoid power factor correction module and fault detection module
Between generate and interfere with each other, and then ensure the accurate of detection of the fault detection circuit to the voltage or electric current at sampling resistor both ends
Property, so that fault detection circuit is safer and more reliable.
In any of the above-described technical solution, it is preferable that the first power module is connected with the first power supply, the first power module
It include: rectification module, the input terminal of rectification module is connected with the first power supply, the output end of rectification module and PFC
Module is connected.
In the technical scheme, the first power module is connected with the first power supply, and the first power supply is external power supply, preferably
AC power source；By the way that rectification module is arranged, the first power supply is rectified and/or filtered, it is ensured that is be connected with the first power supply is negative
Carry the stability of work.Preferably, rectification module includes filter and/or rectifier.
In any of the above-described technical solution, it is preferable that fault detection module includes: comparison module, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the 6th resistance, first capacitor, first diode and third power module；One end of 3rd resistor and the first electricity
One end of resistance is connected, and the other end is connected with the first reverse input end of comparison module；One end of 4th resistance and the first electricity
The other end of resistance is connected, and the other end is connected with the first positive input of comparison module；One end of 5th resistance and third
The other end of resistance is connected；The other end of 6th resistance is connected with the other end of the 4th resistance, the other end and the 5th resistance
The other end be connected；One end of first capacitor is connected with the first output end of comparison module, the other end and comparison module
Second positive input is connected；First diode anode be connected with one end of first capacitor, first diode it is another
End is the output end of fault detection module；Third power module is connected with the feeder ear of comparison module, and with the 6th resistance
The other end is connected.
In the technical scheme, by 3rd resistor, the 4th resistance as pull-up resistor resistance value and the 5th resistance
The action current determined via first resistor is assured that with the 6th resistance.In order to avoid occurring upsetting letter in first resistor
Number, it is connected in parallel with a capacitor in the first reverse input end of comparison module and the first positive input of comparison module, and then realize
Filter the effect of interference.
In any of the above-described technical solution, it is preferable that fault detection module includes: the 7th resistance, the 8th resistance, the 9th electricity
Resistance, the tenth resistance and the second diode, the 7th resistance are connected with the second reverse input end of comparison module, and the other end is compared with
The ground terminal of module is connected, and is grounded；One end of 8th resistance is connected with the second reverse input end of comparison module, another
End is connected with third power module；One end of 9th resistance is connected with the other end of first capacitor；One end of tenth resistance
It is connected with one end of first capacitor, the other end is connected with the other end of the 9th resistance；The anode and the tenth of second diode
One end of resistance is connected, and the cathode of diode is connected with the other end of the tenth resistance.
In the technical scheme, the second positive input of comparison module is input to by comparing the first output end of module
End is exported by comparing the second output terminal of module to the control terminal of power switch using first capacitor realization delay function, into
And realize the control of overcurrent.
In any of the above-described technical solution, it is preferable that third power module is connected with third power supply, third power module
It include: eleventh resistor, one end of eleventh resistor is connected with third power supply, the other end and comparison module of eleventh resistor
Feeder ear be connected, and be connected with the other end of the 6th resistance.
In the technical scheme, third power module is connected with third power supply, and third power supply is external power supply, preferably
15V DC power supply；By the way that eleventh resistor is arranged between third power supply and comparison module, avoid third power supply in radio circuit
Upper short circuit, it is ensured that third power supply can directly be connected with the feeder ear of comparison module, power for comparison module.
In any of the above-described technical solution, it is preferable that the grounding point of the 7th resistance is identical as the grounding point of first resistor.
In the technical scheme, by by the 7th resistance, comparison module and first resistor altogether so that fault detection module
Pick-up point power factor correction module power switch aggregation point close to the side of first resistor, it is ensured that fault detection module
It is interfered during the work time, it is ensured that the stability of fault detection module work avoids the phenomenon that generating wrong report overcurrent.
In any of the above-described technical solution, it is preferable that the quantity of power factor correction module is multiple, multiple power factors
Correction module is in parallel；The quantity of fault detection module and the quantity of power factor correction module are identical.
In the technical scheme, each fault detection module respectively corresponds a power factor correction module, realizes to function
The protection of rate factor correcting module.
The utility model second aspect provides a kind of air conditioner, including the circuit as described in any of the above-described technical solution
Plate, therefore the air conditioner has whole beneficial effects of circuit board described in any of the above-described technical solution.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 shows the schematic diagram of the power factor correction module of one embodiment according to the present utility model；
Fig. 2 shows the schematic diagrames of the power factor correction module of another embodiment according to the present utility model；
Fig. 3 shows the schematic diagram of the power factor correction module of another embodiment according to the present utility model；
Fig. 4 shows the board circuit schematic diagram of one embodiment according to the present utility model；
Fig. 5 shows the schematic diagram of the fault detection module of one embodiment according to the present utility model；
Fig. 6 shows the schematic layout pattern of the circuit board of one embodiment according to the present utility model；
Wherein, the corresponding relationship between appended drawing reference and component names of the Fig. 1 into Fig. 5 are as follows:
1 power factor correction module, 12 first power factor correction modules, 14 second power factor correction modules, 16
Three power factor correction modules, 102 first inductance, 104 power switch, 106 drive modules, 108 second power supply modules, 1082 is anti-
Cross die block, 1084 Voltage stabilizing modules, 110 second resistances, the grounding point of 112 first resistors, 114 first resistors, 116 the 12nd electricity
Resistance, 118 first triodes, 120 second triodes, 2 fault detection modules, 22 Fisrt fault detection modules, the inspection of 24 second failures
Survey module, 26 third fault detection modules, 202 3rd resistors, 204 the 4th resistance, 206 the 5th resistance, 208 the 6th resistance, 210
7th resistance, 212 the 8th resistance, 214 the 9th resistance, 216 the tenth resistance, 218 first capacitors, 220 first diodes, 222
Two diodes, 224 comparison modules, 226 eleventh resistors, the grounding point of 228 fault detection modules, 3 control modules.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model, still, this is practical
Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously
It is not limited by the specific embodiments disclosed below.
Circuit board and air conditioner according to the utility model some embodiments are described referring to Fig. 1 to Fig. 6.
In the utility model first aspect embodiment, as shown in Figures 1 to 5, the utility model has supplied a kind of circuit board,
Including the first power module, the first power module is used to be load supplying, circuit board further include: 1 He of power factor correction module
One end of fault detection module 2, power factor correction module 1 is connected with the power supply module, and power factor correction module 1 includes the
One end of one resistance 114 and power switch 104, first resistor 114 is connected with the emitter of power switch 104, first resistor
114 other end ground connection；The input terminal of fault detection module 2 is connected with first resistor 114；Wherein, fault detection module
Grounding point 228 is identical as the grounding point 112 of first resistor, interferes with each other to avoid between multiple fault detection modules 2.
In this embodiment, circuit board realizes the inspection to power factor correction module 1 by setting fault detection module 2
It surveys and protects, power factor correction module 1 is avoided to generate over-current phenomenon avoidance；By the way that fault detection module 2 and first resistor 114 are set
It is set to total place, so that the pick-up point of fault detection module 2 rests firmly against the position that sampling resistor is connected with negative busbar, so that
The ground wire of each fault detection module 2 is independent, is directly connected near sampled signal, eliminates power factor correction module 1
The common mode interference of introducing reduces the circulation of system voltage, and on the other hand, driving circuit is also decoupled with sample circuit, avoids
Interfering with each other between influence and multiple fault detection modules 2 of the power switch 104 to sampling resistor, and then ensure event
Hinder detection circuit to the accuracy of the detection of the voltage or electric current at sampling resistor both ends so that fault detection circuit it is safer,
Reliably.
Specifically, the voltage at fault detection circuit acquisition 114 both ends of first resistor, according to the voltage and first resistor 114
Resistance value calculate the electric current of first resistor 114, compare the size between the electric current and predetermined current of first resistor 114, i.e.,
Can determine whether power factor correction module 1 whether overcurrent；The electricity at 114 both ends of first resistor can be equally acquired by fault detection circuit
Pressure, and the voltage is compared with predeterminated voltage, so judge power factor correction module 1 whether overcurrent.First resistor 114 is
Sampling resistor.
In one embodiment of the utility model, it is preferable that as shown in Figure 1, power factor correction module 1 further include:
First inductance 102, drive module 106 and second power supply module 108；One end of first inductance 102 is connected with the power supply module, separately
One end is connected with the collector of power switch 104；The output end phase of the input terminal of drive module 106 and fault detection module 2
Connection, the output end phase of drive module 106 are connected with the base stage of power switch 104；Second power supply module 108 and drive module
106 feeder ear is connected.
In this embodiment, by the way that drive module 106 is arranged, drive module 106 is used to control the conducting of power switch 104
With disconnection, drive module 106 is connected with fault detection module 2, when over-current phenomenon avoidance, fault detection electricity occur for power switch 104
Road detects 114 overcurrent of first resistor, and over-current signal is sent to drive module 106, and drive module 106 controls power switch
104 disconnect, and power factor correction module 1 stops working, when power switch 104 works normally, when over-current phenomenon avoidance not occurring, and failure
Detection circuit sends electric current normal signal to drive module 106, and driving circuit control power switch 104 tends to remain on, function
Rate factor correcting module 1 works normally.Preferably, power switch 104 is IGBT (Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor) or metal-oxide-semiconductor (metal-oxide-semiconductor field effect transistor,
Metal-oxide semiconductor fieldeffect transistor).
In any of the above-described technical solution, it is preferable that as shown in Figure 1, power factor correction module 1 further include: the second electricity
Resistance 110, one end of second resistance 110 is connected with the output end of drive module 106, the other end and power of second resistance 110
The base stage of switch 104 is connected.
In this embodiment, by the way that second resistance 110, one end of second resistance 110 and the output of drive module 106 is arranged
End is connected, and the other end of second resistance 110 is connected with the base stage of power switch 104, it is ensured that drive module 106 is opened to power
The driving signal for closing 104 sendings is more stable, and then ensures the stability that power switch 104 works.
In any of the above-described technical solution, it is preferable that as shown in Fig. 2, second power supply module 108 is connected with second source
It connects, second power supply module 108 includes: twelfth resistor 116, and one end of twelfth resistor 116 is connected with second source, another
End is connected with the feeder ear of drive module 106.
In this embodiment, second power supply module 108 is connected with second source, and second source is external power supply, preferably
For 15V DC power supply；By the way that twelfth resistor 116 is arranged between second source and drive module 106, second source is avoided to exist
It is short-circuit on radio circuit, it is ensured that second source can directly be connected with the feeder ear of drive module 106, supply for drive module 106
Electricity.
In any of the above-described technical solution, it is preferable that as shown in Figure 1, second power supply module 108 further include: Voltage stabilizing module
1084 and it is anti-cross die block 1082,1084 one end of Voltage stabilizing module is connected with second source, and the other end is grounded；It is anti-to cross die block
1082 one end is connected with second source, other end ground connection.
In this embodiment, by the way that Voltage stabilizing module 1084 is arranged, it is ensured that the voltage stabilization of drive module 106 passes through setting
It is anti-to cross die block 1082, avoid drive module 106 from burning because of second source over-voltage.Preferably, Voltage stabilizing module 1084 includes two
The capacitor of a parallel connection, anti-die block 1082 of crossing is diode.
In any of the above-described technical solution, it is preferable that as shown in Figures 2 and 3, circuit board further includes control module 3, is such as schemed
Shown in 2, power factor correction module 1 further include: the first triode 118 and the second triode 120；The base stage of first triode with
The output end of control module 3 is connected, and the collector of the first triode 118 is connected with the 4th power supply；The base of second triode
Pole is connected with the output end of control module 3, and the emitter of the second triode 120 is connected with the emitter of the first triode 118
It connects, and is connected with the input terminal of drive module 106, the grounded collector of the second triode 120.
In this embodiment, by the first triode 118 of setting and the second triode 120, the conversion of level is realized, so that
The grounding point of drive module 106 and the grounding point of fault detection circuit are mutually indepedent, avoid power factor correction module 1 and failure
It generates and interferes with each other between detection module 2, and then ensure inspection of the fault detection circuit to the voltage or electric current at sampling resistor both ends
The accuracy of survey, so that fault detection circuit is safer and more reliable.
In any of the above-described technical solution, it is preferable that the first power module is connected with the first power supply, the first power module
It include: rectification module, the input terminal of rectification module is connected with the first power supply, the output end of rectification module and PFC
Module 1 is connected.
In this embodiment, the first power module is connected with the first power supply, and the first power supply is external power supply, preferably hands over
Galvanic electricity source；By the way that rectification module is arranged, the first power supply is rectified and/or filtered, it is ensured that the load being connected with the first power supply
The stability of work.Preferably, rectification module includes filter and/or rectifier.
In any of the above-described technical solution, it is preferable that as shown in Figure 4 and Figure 5, fault detection module 2 includes: comparison module
224,3rd resistor 202, the 4th resistance 204, the 5th resistance 206, the 6th resistance 208, first capacitor 218, first diode 220
With third power module；One end of 3rd resistor 202 is connected with one end of first resistor 114, the other end and comparison module 224
The first reverse input end be connected；One end of 4th resistance 204 is connected with the other end of first resistor 114, the other end with
First positive input of comparison module 224 is connected；One end of 5th resistance 206 is connected with the other end of 3rd resistor 202
It connects；The other end of 6th resistance 208 is connected with the other end of the 4th resistance 204, the other end of the other end and the 5th resistance 206
It is connected；One end of first capacitor 218 is connected with the first output end of comparison module 224, the other end and comparison module 224
Second positive input is connected；The anode of first diode 220 is connected with one end of first capacitor 218, first diode
220 other end is the output end of fault detection module 2；Third power module is connected with the feeder ear of comparison module 224, and
It is connected with the other end of the 6th resistance 208.
In this embodiment, by 3rd resistor 202, the 4th resistance 204 as pull-up resistor resistance value and the 5th
Resistance 206 and the 6th resistance 208 are assured that the action current determined via first resistor 114.In order to avoid in the first electricity
There is jammer signal in resistance 114, in the first reverse input end of comparison module 224 and the first positive input of comparison module 224
It is connected in parallel with a capacitor, and then realizes the effect of filtering interference.
In any of the above-described technical solution, it is preferable that as shown in Figure 4 and Figure 5, fault detection module 2 includes: the 7th resistance
210, the 8th resistance 212, the 9th resistance 214, the tenth resistance 216 and the second diode 222, the 7th resistance 210 and comparison module
224 the second reverse input end is connected, and the other end is connected with the ground terminal of comparison module 224, and is grounded；8th resistance
212 one end is connected with the second reverse input end of comparison module 224, and the other end is connected with third power module；9th
One end of resistance 214 is connected with the other end of first capacitor 218；One end of tenth resistance 216 and one end of first capacitor 218
It is connected, the other end is connected with the other end of the 9th resistance 214；The anode of second diode 222 and the one of the tenth resistance 216
End is connected, and the cathode of diode is connected with the other end of the tenth resistance 216.
In this embodiment, the second forward direction for being input to comparison module 224 by comparing the first output end of module 224 is defeated
Enter end, realizes delay function using first capacitor 218, export by comparing the second output terminal of module 224 to power switch 104
Control terminal, and then realize overcurrent control.
In any of the above-described technical solution, it is preferable that as shown in Figure 4 and Figure 5, third power module is connected with third power supply
It connecing, third power module includes: eleventh resistor 226, and one end of eleventh resistor 226 is connected with third power supply, and the 11st
The other end of resistance 226 is connected with the feeder ear of comparison module 224, and is connected with the other end of the 6th resistance 208.
In this embodiment, third power module is connected with third power supply, and third power supply is external power supply, preferably
15V DC power supply；By the way that eleventh resistor 226 is arranged between third power supply and comparison module 224, avoid third power supply in height
It is short-circuit on frequency circuit, it is ensured that third power supply can directly be connected with the feeder ear of comparison module 224, power for comparison module 224.
In any of the above-described technical solution, it is preferable that the grounding point of the 7th resistance 210 and the grounding point 112 of first resistor
It is identical.
In this embodiment, by by the 7th resistance 210, comparison module 224 and first resistor 114 altogether so that failure
The pick-up point of detection module 2 power factor correction module 1 104 aggregation point of power switch close to the side of first resistor 114,
Ensure that fault detection module 2 is interfered during the work time, it is ensured that the stability that fault detection module 2 works avoids generating
The phenomenon that reporting overcurrent by mistake.
In any of the above-described technical solution, it is preferable that as shown in Figure 4 and Figure 5, the quantity of power factor correction module 1 is
Multiple, multiple power factor correction modules 1 are in parallel；The quantity phase of the quantity of fault detection module 2 and power factor correction module 1
Together.
In this embodiment, each fault detection module 2 respectively corresponds a power factor correction module 1, realizes to function
The protection of rate factor correcting module 1.
Preferably, multiple power factor correction modules 1 include three power factor correction modules 1, respectively the first power
Factor correcting module 12, the second power factor correction module 14 and third power factor correction module 16, the first power factor school
Positive module 12, the second power factor correction module 14 and third power factor correction module 16 are in parallel；Multiple fault detection modules 2
Including three fault detection modules 2, respectively Fisrt fault detection module 22, the second fault detection module 24 and the inspection of third failure
Module 26 is surveyed, Fisrt fault detection module 22, the second fault detection module 24 and third fault detection module 26 are respectively with first
Power factor correction module 12, the second power factor correction module 14 are connected with third power factor correction module 16, to protect
Protect the first power factor correction module 12, the second power factor correction module 14 and third power factor correction module 16.
Preferably, as shown in fig. 6, on circuit boards, the pick-up point of multiple fault detection modules 2 is located at arrow A, arrow B
In the region of arrow C meaning.
Preferably, eleventh resistor and twelfth resistor can be resistance, can also be multiple resistor coupled in parallel, can also be inductance etc.
Impedor.
In the utility model second aspect embodiment, the utility model provides a kind of air conditioner, including such as above-mentioned
Circuit board described in one embodiment, thus the air conditioner have any of the above-described embodiment described in circuit board all beneficial to imitate
Fruit.
Term " multiple " then refers to two or more in the description of the present invention, unless otherwise restricted clearly,
The orientation or positional relationship of the instructions such as term " on ", "lower" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the utility model and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention；Term " connection ", " installation ",
" fixation " etc. shall be understood in a broad sense, for example, " connection " may be a fixed connection, may be a detachable connection, or integrally
Connection；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Term " one embodiment ", " some embodiments ", " specific embodiment " etc. are retouched in the description of the present invention,
It states and means that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained in the utility model at least
In one embodiment or example.In the present invention, schematic expression of the above terms are not necessarily referring to identical reality
Apply example or example.Moreover, the particular features, structures, materials, or characteristics of description can in any one or more embodiments or
It can be combined in any suitable manner in example.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (13)
1. a kind of circuit board, including the first power module, first power module is used to be load supplying, which is characterized in that
The circuit board further include:
Power factor correction module, one end of the power factor correction module are connected with the power module, the power
Factor correcting module includes first resistor and power switch, the emitter phase of one end of the first resistor and the power switch
Connection, the other end ground connection of the first resistor；
Fault detection module, the input terminal of the fault detection module are connected with the first resistor；
Wherein, the grounding point of the fault detection module is identical as the grounding point of the first resistor, to avoid multiple events
It is interfered with each other between barrier detection module.
2. circuit board according to claim 1, which is characterized in that the power factor correction module further include:
One end of first inductance, first inductance is connected with the power module, the collection of the other end and the power switch
Electrode is connected；
Drive module, the input terminal of the drive module are connected with the output end of the fault detection module, the driving mould
The output end phase of block is connected with the base stage of the power switch；
Second power supply module, the second power supply module are connected with the feeder ear of the drive module.
3. circuit board according to claim 2, which is characterized in that the power factor correction module further include:
Second resistance, one end of the second resistance are connected with the output end of the drive module, the second resistance it is another
One end is connected with the base stage of the power switch.
4. circuit board according to claim 2, which is characterized in that the second power supply module is connected with second source,
The second power supply module includes:
Twelfth resistor, one end of the twelfth resistor are connected with the second source, the other end and the drive module
Feeder ear be connected.
5. circuit board according to claim 4, which is characterized in that the second power supply module further include:
Voltage stabilizing module, described Voltage stabilizing module one end are connected with the second source, other end ground connection；
Anti- to cross die block, described anti-one end for crossing die block is connected with the second source, other end ground connection.
6. circuit board according to claim 2, which is characterized in that
The circuit board further includes control module；
The power factor correction module further include:
The base stage of first triode, first triode is connected with the output end of the control module, the one or three pole
The collector of pipe is connected with the 4th power supply；
The base stage of second triode, second triode is connected with the output end of the control module, the two or three pole
The emitter of pipe is connected with the emitter of first triode, and is connected with the input terminal of the drive module, described
The grounded collector of second triode.
7. circuit board according to any one of claim 1 to 6, which is characterized in that first power module and first
Power supply is connected, and first power module includes:
Rectification module, the input terminal of the rectification module are connected with first power supply, the output end of the rectification module with
The power factor correction module is connected.
8. circuit board according to any one of claim 1 to 6, which is characterized in that the fault detection module includes:
Comparison module；
3rd resistor, one end of the 3rd resistor are connected with one end of the first resistor, other end mould compared with described
First reverse input end of block is connected；
One end of 4th resistance, the 4th resistance is connected with the other end of the first resistor, and the other end is compared with described
First positive input of module is connected；
One end of 5th resistance, the 5th resistance is connected with the other end of the 3rd resistor；
The other end of 6th resistance, the 6th resistance is connected with the other end of the 4th resistance, the other end and described the
The other end of five resistance is connected；
First capacitor, one end of the first capacitor are connected with the first output end of the comparison module, the other end with it is described
Second positive input of comparison module is connected；
The anode of first diode, the first diode is connected with one end of the first capacitor, the first diode
The other end be the fault detection module output end；
Third power module, the third power module are connected with the feeder ear of the comparison module, and with it is described 6th electricity
The other end of resistance is connected.
9. circuit board according to claim 8, which is characterized in that the fault detection module includes:
7th resistance, the 7th resistance are connected with the second reverse input end of the comparison module, the other end and the ratio
Ground terminal compared with module is connected, and is grounded；
One end of 8th resistance, the 8th resistance is connected with the second reverse input end of the comparison module, the other end with
The third power module is connected；
One end of 9th resistance, the 9th resistance is connected with the other end of the first capacitor；
One end of tenth resistance, the tenth resistance is connected with one end of the first capacitor, the other end and the 9th electricity
The other end of resistance is connected；
The anode of second diode, second diode is connected with one end of the tenth resistance, and the diode is born
Pole is connected with the other end of the tenth resistance.
10. circuit board according to claim 9, which is characterized in that the third power module is connected with third power supply,
The third power module includes:
Eleventh resistor, one end of the eleventh resistor are connected with the third power supply, the eleventh resistor it is another
End is connected with the feeder ear of the comparison module, and is connected with the other end of the 6th resistance.
11. circuit board according to claim 9, which is characterized in that
The grounding point of 7th resistance is identical as the grounding point of the first resistor.
12. circuit board according to any one of claim 1 to 6, which is characterized in that
The quantity of the power factor correction module is multiple, multiple power factor correction modules parallel connections；
The quantity of the fault detection module is identical as the quantity of the power factor correction module.
13. a kind of air conditioner, which is characterized in that including the circuit board as described in any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920021037.0U CN209341522U (en) | 2019-01-07 | 2019-01-07 | Circuit board and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920021037.0U CN209341522U (en) | 2019-01-07 | 2019-01-07 | Circuit board and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209341522U true CN209341522U (en) | 2019-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920021037.0U Active CN209341522U (en) | 2019-01-07 | 2019-01-07 | Circuit board and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN209341522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665408A (en) * | 2020-06-16 | 2020-09-15 | 河南里程碑科技有限公司 | High-protection distribution box fault detection method and device |
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2019
- 2019-01-07 CN CN201920021037.0U patent/CN209341522U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665408A (en) * | 2020-06-16 | 2020-09-15 | 河南里程碑科技有限公司 | High-protection distribution box fault detection method and device |
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